public class SumUtils {
    public static void A(int a, int b) {
        System.out.println(a+b);
    }
    public static void B(float a,float b) {
        System.out.println(a+b);
    }
    public static void C(char a,char b) {
        System.out.println(a+b);
    }
    public static void D(int a) {
        int sum = 0;
        for (int i = 0; i < a; i++) {
            sum +=i;
        }
        System.out.println(sum);
    }
}
